The proposed tandem has a broad band-antimoon-moon-doped CS2agbibr6 (specific CS2agbi0.75SB0.25BR6) Top cell and a narrow bandgap formamidinium tinjodide (Fasni3) bottom device.
Researchers from the University of Babylon in Iraq have simulated a new two-termal (2T) Lead-free all-perovskite tandem solar cell with a wide band gap-antimoon-doted perovskite topsubcell and a narrow bandgap formamidinium tin tin jodjamiti subcellentie van finding a potential power subcellion 28.22%.
“Our research included the numerical simulation of a new, two-termal (2T) All-Perovskiet Lead-free tandem solar cell using the Scaps-1d software (Solar Cell Capacitance Simulator),” Ghaleb Ali al-Dahash, corresponding author of the research said PV Magazine.
The proposed tandem has a wide band-antimoon-doped CS2agBibr6, specific CS2agbi0.75SB0.25BR6, top cell and a narrow bandgap formamidinium tinjodide (pasni3) bottom device.
The novelty of the work lies in the use of two investigated lead-free perovskiet materials, specifically selected to tackle known stability problems in lead-free perovskites and, according to Al-Dahash, to offer very efficient power conversion.
“Double Perovskites such as CS2AGBIBBR6 is known to be more stable against moisture and heat compared to many leadhalide perovskites,” said al-dahash, adding that although fasni3 has stabel problems “in connection with the oxidation of tiny, they were not evident, the cell was obvious when the cell was obviously, the cell was obvious,” the cell was evident ” cell.
“Our simulations show that this lead-free design has the potential to achieve a current conversion efficiency of 28.22%, which is an important progress for environmentally friendly photovoltaics and the performance of some lead-based counterparts,” said Al-Dahash.
The efficiency was achieved under standard lighting conditions. The tandem cell also reached a filling factor of 88.74 %, with a short -circuit current density of 27,886 MA/CM2 and an open circuit voltage of 1,1402 V.
The optimized structure was as follows: transparent fluor-doted tinoxide (FTO) pre-contact, titanium oxide (TIO2) electron transport layer, perovskite absorber (CS2AGBI0.75SB0.25BR6), formamidinium (Fasni) and copy-tin-tin-tin-tin-tin-tin-tin-tin-tin-tin-tin-tin-tin-tin-tin-tin-tin-tin-tin-tin-tin-tin-tin-tin-tin-tin-tin-tin-tin-way Gold back and gold. contact.
When comparing the work with previously reported results, the researchers said that their optimized cells competed well on overall efficiency. “This shows how well our layered material system and CU2O hole transport layer works, “they said.
Their work is described in High-quality Lead-free All-Perovskite Tandem solar cells that achieve 28.22 % power conversion efficiency: A CS2agbi0.75SB0.25BR6/Fasni3 Heterostructure designPublished in Results in optics.
“The study offers an optimized route for creating scalable, powerful and non-toxic tandem solar cells,” Al-Dahash said.
The research team is currently designing a new Tandem All-Perovskite device with a target with a higher efficiency, according to Al-Dahash.
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